loop4: detected capacity change from 0 to 1024 ================================================================== BUG: KASAN: slab-out-of-bounds in hfsplus_bnode_read+0x9c/0x248 fs/hfsplus/bnode.c:32 Read of size 8 at addr ffff0000dac06ce0 by task syz.4.422/6180 CPU: 1 PID: 6180 Comm: syz.4.422 Not tainted 6.1.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 Call trace: dump_backtrace+0x1c8/0x1f4 arch/arm64/kernel/stacktrace.c:158 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:165 __dump_stack+0x30/0x40 lib/dump_stack.c:88 dump_stack_lvl+0xf8/0x160 lib/dump_stack.c:106 print_address_description+0x88/0x220 mm/kasan/report.c:316 print_report+0x50/0x68 mm/kasan/report.c:427 kasan_report+0xa8/0x100 mm/kasan/report.c:531 __asan_report_load8_noabort+0x2c/0x38 mm/kasan/report_generic.c:351 hfsplus_bnode_read+0x9c/0x248 fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x274/0x384 fs/hfsplus/bnode.c:-1 hfsplus_brec_remove+0x3cc/0x4a0 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x198/0x33c fs/hfsplus/attributes.c:299 hfsplus_delete_attr+0x2ac/0x3f0 fs/hfsplus/attributes.c:345 hfsplus_removexattr fs/hfsplus/xattr.c:794 [inline] __hfsplus_setxattr+0xa10/0x1a30 fs/hfsplus/xattr.c:275 hfsplus_setxattr+0xdc/0x12c fs/hfsplus/xattr.c:434 hfsplus_user_setxattr+0x54/0x6c fs/hfsplus/xattr_user.c:30 __vfs_removexattr+0x370/0x38c fs/xattr.c:479 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:514 vfs_removexattr+0x80/0x190 fs/xattr.c:536 removexattr fs/xattr.c:878 [inline] path_removexattr+0x188/0x31c fs/xattr.c:892 __do_sys_removexattr fs/xattr.c:906 [inline] __se_sys_removexattr fs/xattr.c:903 [inline] __arm64_sys_removexattr+0x60/0x78 fs/xattr.c:903 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Allocated by task 6180: kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x4c/0x80 mm/kasan/common.c:52 kasan_save_alloc_info+0x28/0x34 mm/kasan/generic.c:505 ____kasan_kmalloc mm/kasan/common.c:374 [inline] __kasan_kmalloc+0xa0/0xb8 mm/kasan/common.c:383 kasan_kmalloc include/linux/kasan.h:211 [inline] __do_kmalloc_node mm/slab_common.c:936 [inline] __kmalloc+0xec/0x178 mm/slab_common.c:949 kmalloc include/linux/slab.h:568 [inline] kzalloc include/linux/slab.h:699 [inline] __hfs_bnode_create+0xe4/0x6cc fs/hfsplus/bnode.c:415 hfsplus_bnode_find+0x1f0/0xb78 fs/hfsplus/bnode.c:492 hfsplus_brec_find+0x128/0x448 fs/hfsplus/bfind.c:172 hfsplus_find_attr+0x1e0/0x32c fs/hfsplus/attributes.c:-1 hfsplus_attr_exists+0x150/0x1c4 fs/hfsplus/attributes.c:182 __hfsplus_setxattr+0x2b8/0x1a30 fs/hfsplus/xattr.c:336 hfsplus_setxattr+0xdc/0x12c fs/hfsplus/xattr.c:434 hfsplus_user_setxattr+0x54/0x6c fs/hfsplus/xattr_user.c:30 __vfs_setxattr+0x388/0x3a4 fs/xattr.c:182 __vfs_setxattr_noperm+0x120/0x564 fs/xattr.c:216 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:277 vfs_setxattr+0x158/0x2ac fs/xattr.c:309 do_setxattr fs/xattr.c:594 [inline] setxattr+0x228/0x28c fs/xattr.c:617 path_setxattr+0x12c/0x25c fs/xattr.c:636 __do_sys_setxattr fs/xattr.c:652 [inline] __se_sys_setxattr fs/xattr.c:648 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:648 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Last potentially related work creation: kasan_save_stack+0x40/0x70 mm/kasan/common.c:45 __kasan_record_aux_stack+0xc0/0xdc mm/kasan/generic.c:486 kasan_record_aux_stack_noalloc+0x14/0x20 mm/kasan/generic.c:496 kvfree_call_rcu+0xb4/0x6f0 kernel/rcu/tree.c:3401 ip_ma_put+0x108/0x194 net/ipv4/igmp.c:171 __ip_mc_dec_group+0x52c/0x604 net/ipv4/igmp.c:1697 ip_mc_dec_group include/linux/igmp.h:135 [inline] ip_mc_down+0x2d4/0x3b8 net/ipv4/igmp.c:1752 inetdev_event+0x228/0x12ec net/ipv4/devinet.c:1602 notifier_call_chain kernel/notifier.c:87 [inline] raw_notifier_call_chain+0xd4/0x164 kernel/notifier.c:455 call_netdevice_notifiers_info net/core/dev.c:2001 [inline] call_netdevice_notifiers_extack net/core/dev.c:2039 [inline] call_netdevice_notifiers net/core/dev.c:2053 [inline] dev_close_many+0x2cc/0x440 net/core/dev.c:1601 dev_close+0x148/0x1f8 net/core/dev.c:1623 cfg80211_shutdown_all_interfaces+0xc0/0x1d8 net/wireless/core.c:275 ieee80211_remove_interfaces+0x154/0x5ec net/mac80211/iface.c:2364 ieee80211_unregister_hw+0x60/0x278 net/mac80211/main.c:1478 mac80211_hwsim_del_radio+0x210/0x3a8 drivers/net/wireless/mac80211_hwsim.c:4683 hwsim_exit_net+0x49c/0x558 drivers/net/wireless/mac80211_hwsim.c:5470 ops_exit_list net/core/net_namespace.c:172 [inline] cleanup_net+0x5c4/0xa74 net/core/net_namespace.c:640 process_one_work+0x7f4/0x13a8 kernel/workqueue.c:2292 worker_thread+0x8c8/0xfbc kernel/workqueue.c:2439 kthread+0x250/0x2d8 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:864 The buggy address belongs to the object at ffff0000dac06c00 which belongs to the cache kmalloc-256 of size 256 The buggy address is located 224 bytes inside of 256-byte region [ffff0000dac06c00, ffff0000dac06d00) The buggy address belongs to the physical page: page:0000000050a6190d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x11ac06 head:0000000050a6190d order:1 compound_mapcount:0 compound_pincount:0 flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff) raw: 05ffc00000010200 fffffc000369a080 dead000000000004 ffff0000c0002480 raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected Memory state around the buggy address: ffff0000dac06b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000dac06c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffff0000dac06c80: 00 00 00 fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff0000dac06d00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff0000dac06d80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ================================================================== Unable to handle kernel paging request at virtual address ffff68a00000c1ff KASAN: maybe wild-memory-access in range [0xffff450000060ff8-0xffff450000060fff] Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001ac619000 [ffff68a00000c1ff] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6180 Comm: syz.4.422 Tainted: G B 6.1.136-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : bytes_is_nonzero mm/kasan/generic.c:85 [inline] pc : memory_is_nonzero mm/kasan/generic.c:102 [inline] pc : memory_is_poisoned_n mm/kasan/generic.c:128 [inline] pc : memory_is_poisoned mm/kasan/generic.c:159 [inline] pc : check_region_inline mm/kasan/generic.c:180 [inline] pc : kasan_check_range+0x64/0x2a0 mm/kasan/generic.c:189 lr : memcpy+0x48/0x90 mm/kasan/shadow.c:65 sp : ffff800020f97010 x29: ffff800020f97010 x28: 0000000000000001 x27: 0000000040000000 x26: 1ffff00002951d84 x25: dfff800000000000 x24: 0000000000001000 x23: 0000000000000001 x22: ffff800008f68c88 x21: ffff800020f97100 x20: ffff450000060fff x19: 0000000000000001 x18: ffff800011a7bd00 x17: 0000000000000000 x16: ffff800008042940 x15: 0000000000000000 x14: 00000000000000ff x13: 0000000000ff0100 x12: 0000000000000001 x11: 1fffe8a00000c1ff x10: 1fffe8a00000c1ff x9 : ffffffffffffffff x8 : ffff68a00000c1ff x7 : 0000000000000001 x6 : 00000000000000ff x5 : ffff800020f97122 x4 : ffff0000f62c900c x3 : ffff800008f68c88 x2 : 0000000000000000 x1 : 0000000000000001 x0 : ffff450000060fff Call trace: bytes_is_nonzero mm/kasan/generic.c:84 [inline] memory_is_nonzero mm/kasan/generic.c:102 [inline] memory_is_poisoned_n mm/kasan/generic.c:128 [inline] memory_is_poisoned mm/kasan/generic.c:159 [inline] check_region_inline mm/kasan/generic.c:180 [inline] kasan_check_range+0x64/0x2a0 mm/kasan/generic.c:189 memcpy+0x48/0x90 mm/kasan/shadow.c:65 memcpy_from_page include/linux/highmem.h:393 [inline] hfsplus_bnode_read+0x124/0x248 fs/hfsplus/bnode.c:32 hfsplus_bnode_dump+0x274/0x384 fs/hfsplus/bnode.c:-1 hfsplus_brec_remove+0x3cc/0x4a0 fs/hfsplus/brec.c:229 __hfsplus_delete_attr+0x198/0x33c fs/hfsplus/attributes.c:299 hfsplus_delete_attr+0x2ac/0x3f0 fs/hfsplus/attributes.c:345 hfsplus_removexattr fs/hfsplus/xattr.c:794 [inline] __hfsplus_setxattr+0xa10/0x1a30 fs/hfsplus/xattr.c:275 hfsplus_setxattr+0xdc/0x12c fs/hfsplus/xattr.c:434 hfsplus_user_setxattr+0x54/0x6c fs/hfsplus/xattr_user.c:30 __vfs_removexattr+0x370/0x38c fs/xattr.c:479 __vfs_removexattr_locked+0x1d0/0x208 fs/xattr.c:514 vfs_removexattr+0x80/0x190 fs/xattr.c:536 removexattr fs/xattr.c:878 [inline] path_removexattr+0x188/0x31c fs/xattr.c:892 __do_sys_removexattr fs/xattr.c:906 [inline] __se_sys_removexattr fs/xattr.c:903 [inline] __arm64_sys_removexattr+0x60/0x78 fs/xattr.c:903 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2bc arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x13c arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x138 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 5400014c b4000b8c aa2a03e9 8b0b0129 (3940010a) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 5400014c b.gt 0x28 4: b4000b8c cbz x12, 0x174 8: aa2a03e9 mvn x9, x10 c: 8b0b0129 add x9, x9, x11 * 10: 3940010a ldrb w10, [x8] <-- trapping instruction